See the irony: pinboard is a clone of delicious' initial version. it copied the idea, the visual design and started selling it.

In every success story of pinboard, I'm very surprised to see how people are impressed from a carbon copy.

Let me introduce myself: I'm a guy who bookmarks everyday for 5 years, on delicious. After the Yahoo acquire, it was redesigned.

And I was annoyed. I started looking at the alternatives. Most of them were crappy except Pinboard. It was a good copy of old Delicious.

And I decided to use it just because it was a good copy of Delicious!

Then, I noticed that Pinboard is not free. And what it provides is nothing but keeping some text on a database. Same idea, almost same design but it's not free. Let the owner explain why it's not free: it's unsocial. and it'll be online unless a 90% percent of users keep paying it.

It's not ethical, Pinboard. If I think that it's not a waste of time, I'll code some scripts to store bookmarks in Dropbox for your users. It'll be under WTF PL license so that you can sell it.